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user27286
  • Member for 3 years, 7 months
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3 votes
2 answers
803 views

What's the idea behind the unitary freedom of ensemble decompositions for density matrices?

8 votes
1 answer
339 views

What are tentpole topics in quantum computing?

7 votes
3 answers
1k views

Partial Cyclic Permutation with only Toffoli and CNOT gates?

4 votes
1 answer
726 views

Application of QFT to Order-finding

2 votes
1 answer
120 views

5 qubit codewords definition in terms of operators: Mermin

0 votes
1 answer
256 views

What additional conditions are there to make POVM measurement same as projective measurement?

3 votes
3 answers
413 views

Intuition behind the use of inverse FFT in Quantum Circuit for Hamming weight

0 votes
1 answer
41 views

Dimensionality and value of $\mathbb{I}_A$ in Quantum operations

3 votes
1 answer
2k views

What is the procedure of finding z-y decomposition of unitary matrices?

1 vote
1 answer
201 views

What is the conjugate transpose of $|0\rangle_{A}|1\rangle_{B}$?

2 votes
1 answer
125 views

Why does $\sum_n \langle n|M_m\rho M_m^\dagger|n\rangle$ simplify to $\langle \psi|M_m^\dagger M_m|\psi\rangle$?

3 votes
1 answer
154 views

Is the order of the tensor product in $|\phi\rangle\otimes|\chi\rangle=|\chi\rangle\otimes|\phi\rangle$ relevant? [duplicate]

1 vote
1 answer
147 views

Does sending a qubit using a quantum network through some conventional physical medium mean it is not with sender anymore after sending?

0 votes
1 answer
334 views

How many real numbers are required to describe density matrix for $n$ qubits?

2 votes
1 answer
140 views

Does $\mathrm{tr}(A \otimes B) = \mathrm{tr} (A) \otimes \mathrm{tr}(B)$ hold for partial trace?

0 votes
1 answer
267 views

Derivation of Equation $8.7$ in Nielsen Chuang [duplicate]

2 votes
1 answer
63 views

What is the meaning of approximating a phase to an accuracy of $2^{-n}$?

1 vote
2 answers
967 views

Is there a simplified formula for the adjoint of the outer product of ket and bra?

0 votes
0 answers
30 views

How do we find out the measurement operators $M_{m}$ which gives us the desired measurement results?

3 votes
4 answers
115 views

In Bell's inequalities, what is the meaning of assuming that the physical properties $P_Q,P_R,P_S,P_T$ have definite values?

2 votes
1 answer
265 views

EPR pair and individual operations [closed]

4 votes
1 answer
202 views

What is the difference between $|0\rangle+|1\rangle$ and a balanced mixture of $|0\rangle$ and $|1\rangle$? [duplicate]

2 votes
1 answer
125 views

Why isn't $\{1,2,3\}$ well ordered? [closed]

2 votes
1 answer
181 views

Stabilizer code: error detection why does it matter?

7 votes
1 answer
1k views

How do we find the stabilizer generators for the three-qubit bit-flip code spanned by $|000\rangle$ and $|111\rangle$?

0 votes
1 answer
241 views

Compute the squared overlap between different given qubit states

3 votes
2 answers
324 views

Output of Quantum Phase Estimation Algorithm

0 votes
2 answers
889 views

Explanation of NOT gate in Hadamard basis [closed]

9 votes
2 answers
2k views

What does it mean to "measure an operator"?

2 votes
1 answer
109 views

Discrepancy in inner product between tensor products